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Silver halide photographic light-sensitive material

a technology of silver halide and light-sensitive materials, applied in the field of high-sensitivity silver halide photographic light-sensitive materials, can solve the problems of insufficient sensitivity level of these methods, the amount of sensitizing dye adsorption to the surface of silver halide grains is limited, and the saturation adsorption of dye chromophore cannot be exceeded by a single layer

Inactive Publication Date: 2007-02-20
FUJIFILM HLDG CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides a high-sensitivity silver halide photographic light-sensitive material with improved sensitivity and image quality. This is achieved by using a silver halide photographic emulsion containing a dye chromophore adsorbed in multiple layers on the surface of the silver halide grain. The dye chromophore can be selected from a variety of compounds, including Dye X, which satisfies certain conditions. The use of Dye X in the photographic emulsion results in a high-sensitivity silver halide photographic light-sensitive material with improved sensitivity and image quality.

Problems solved by technology

However, the amount of a sensitizing dye adsorbed to the surface of a silver halide grain is limited and the dye chromophore cannot be adsorbed in excess of a single layer saturation adsorption (namely, one layer adsorption).
However, the sensitivity level in these methods is not yet satisfied and the silver halide photographic light-sensitive material is demanded to have still higher sensitivity.
However, the sensitivity level in these methods is not yet satisfied and the silver halide photographic light-sensitive material is demanded to have still higher sensitivity.

Method used

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  • Silver halide photographic light-sensitive material
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  • Silver halide photographic light-sensitive material

Examples

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example 1

Preparation of Silver Bromide Octahedral Emulsion (Emulsion A) and Silver Bromide Tabular Emulsions (Emulsion B and Emulsion C)

[0505]To a reactor, 1,000 ml of water, 25 g of deionized ossein gelatin, 15 ml of an aqueous 50% NH4NO3 solution and 7.5 ml of an aqueous 25% NH3 solution were added. The mixture was kept at 50° C. and thoroughly stirred and thereto, 750 mL of an aqueous 1N silver nitrate solution and 1 mol / liter of an aqueous potassium bromide solution were added over 50 minutes. During the reaction, the silver potential was kept at −40 mV. The silver bromide grain obtained was octahedral and had an equivalent-sphere diameter of 0.846±0.036 μm. The temperature of the obtained emulsion was lowered and the emulsion was desalted by ultrafiltration. Subsequently, 95 g of deionized ossein gelatin and 430 ml of water were added to adjust the pH and the pAg at 50° C. to 6.5 and 8.3, respectively. After adding potassium thiocyanate, chloroauric acid and sodium thiosulfate to give o...

example 2

[0547]The same comparison as in Example 1 was performed for the color negative light-sensitive system in Example 1 of JP-A-11-305369, for the color reversal light-sensitive material systems in Example 1 of JP-A-7-92601 and JP-A-11-160828, for the color paper light-sensitive material system in Example 1 of JP-A-6-347944, for the instant light-sensitive material system in Example 1 of JP-A-2000-284442, for the light-sensitive material system for printing in Example 1 of JP-A-8-292512, for the X-ray light-sensitive material system in Example 1 of JP-A-8-122954, and for the heat-developable light-sensitive material systems in Example 5 of JP-A-2000-122206, Example 1 of JP-A-2001-281785 (Japanese Patent Application No. 2000-89436) and Example 1 of JP-A-6-130607. As a result, the same effects as in Example 1 were exhibited.

[0548]According to the present invention, a high-sensitivity silver halide photographic light-sensitive material can be obtained.

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Abstract

A high-sensitivity silver halide photographic light-sensitive material is provided, which is a silver halide photographic light-sensitive material, in which a dye chromophore is adsorbed in multiple layers on the surface of a silver halide grain and at least one of the dye chromophore-containing compounds satisfies: a specific condition relating to the aggregation property, hydrophilicity / hydrophobicity or J-aggregation property; or a specific structure.

Description

FIELD OF THE INVENTION[0001]The present invention relates to a high-sensitivity silver halide photographic light-sensitive material, more specifically, the present invention related to a silver halide photographic light-sensitive material spectrally sensitized to high sensitivity by a dye.BACKGROUND OF THE INVENTION[0002]A great deal of effort has heretofore been made for attaining higher sensitivity of silver halide photographic light-sensitive materials. In a silver halide photographic emulsion, a sensitizing dye adsorbed to the surface of a silver halide grain absorbs light entered into a light-sensitive material and transmits the light energy to the silver halide grain, whereby light sensitivity can be obtained. Accordingly, in the spectral sensitization of silver halide, it is considered that the light energy transmitted to silver halide can be increased by increasing the light absorption factor per the unit grain surface area of a silver halide grain and thereby the spectral s...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): G03C1/46G03C1/005G03C1/06G03C1/494G03C1/12G03C1/035G03C1/09G03C1/14G03C1/16
CPCG03C1/14G03C1/16G03C1/0051G03C1/09G03C2001/097
Inventor HIOKI, TAKANORIKOBAYASHI, KATSUMISUZUKI, RYOKAWANISHI, YASUTOMOSUZUMOTO, TAKESHI
Owner FUJIFILM HLDG CORP